Question: A piano string vibrates at an unknown frequency. To determine the frequency, a tuning fork of frequency of 440 Hz is sounded at the same

A piano string vibrates at an unknown frequency. To determine the frequency, a tuning fork of frequency of 440 Hz is sounded at the same time the piano key is struck. A beat frequency of 4 beats per second is heard. What are the possible frequencies at which the string could be vibrating?

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